VB 7

VB 7 / NSB Type 52a
	Factory photo of VB 7 (1926)
Numbering:	VB 7 / 52a 23
Number:	1
Manufacturer:	Saxon machine factory , No. 4664
Year of construction (s):	1926
Retirement:	February 28, 1958
Type :	1'D1 'T h2
Gauge :	1435 mm ( standard gauge )
Length over buffers:	9,550 mm
Total wheelbase:	6,950 mm
Empty mass:	37.4 t
Service mass:	49.7 t
Friction mass:	36.4 t
Top speed:	50 km / h
Driving wheel diameter:	1,050 mm
Number of cylinders:	2
Cylinder diameter:	430 mm
Piston stroke:	520 mm
Boiler overpressure:	13 kgf / cm 2
Grate area:	1.5 m 2
Tubular heating surface:	71.3 m 2
Superheater area :	17.5 m 2
Water supply:	6.5 t
Fuel supply:	2.5 t

The Norwegian steam locomotive series V.B. 7 was built in 1926 as a one-off by the Sächsische Maschinenfabrik by Richard Hartmann in Chemnitz-Schloßchemnitz , Germany , with the serial number 4664 for the Valdresbane .

history

The superheated steam locomotive ordered in 1926 was given the serial number 7 after delivery and commissioning in the same year.

Used by Norges Statsbaner

With the expiry of the concession for the private Valdresbane on July 1, 1937, the entire Valdresbane and the locomotive were taken over by Norges Statsbaner . There it was given the new series designation NSB 52a and the new company number 23 . It was used in the Oslo district , and in the spring of 1955 it was transferred to the Hamar district . It was only there for a short time, from autumn 1955 it came back to Oslo, where it remained until it was withdrawn on February 28, 1958. After the decommissioning, the locomotive was scrapped .